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The 21st Century Solar System
The Solar System:
List of Ingredients
Ingredient
Sun
Jupiter
Other planets
Everything else
The Sun
A middle-aged, average star:
Mostly Hydrogen & Helium
99.8% of the Solar System
~4.6 billion years old
Shines because it is

Space Exploration
Space Exploration
USA & SPACE
"I believe this nation should
commit itself to achieving the goal, before this decade is out, of landing a man on the Moon and
returning him safely to Earth. No single space project in this period will be mo

As the Moon Changes
Why does the moon have phases?
The revolution of the Moon around the Earth causes the Moon to appear to have phases.
8 Phases of the Moon
New Moon
Waxing Crescent
First Quarter or Half Moon
Waxing Gibbous
New Moon
The moon is not visib

Formation of the Solar System
The Formation of the Solar System
Evolutionary Theories
All evolutionary theories have their start with Descartess whirlpool or vortex theory
proposed in 1644.
Using Newtonian mechanics, Kant (in 1755) and then Laplace (aroun

Stars Evolve
Stars shine by thermonuclear reactions
They have a finite life span, because the hydrogen fuel will be exhausted
A year to a star is like a second to a human
To understand the evolution of stars, the approach is to piece together the
informat

Light
and the
Electromagnetic Spectrum
Light Phenomenon
Isaac Newton (1642-1727) believed light consisted of particles
By 1900 most scientists believed that light behaved as a wave.
The Electromagnetic Spectrum
The electromagnetic spectrum represents the

Living on Mars
1. Earth and Mars
2. Why would we want to live on Mars?
3. The challenges of living on Mars
4. What will we need, and how can we get all these things?
5. Health & Fitness
6. Terraforming
Earth and Mars
Radius:
12746km
6805km
Gravity:
1g
0.3

The Milky Way
Center, Shape
Globular cluster system
Galactic coordinates
Size of the Milky Way
Milky Way from Iowa
Milky Way from Australia
Milky Way from Australia
How do we locate the center of the Milky Way?
Cant see center directly with visible light